
public interface ScaleablePolygon extends Polygon {

	/**
	 * scale multiplies every length of an
	 * polygon with the given factor.
	 * this means that the proportions of
	 * the length stay the same.
	 * the factor must greater than 0.
	 *
	 * @param factor greater than 0
	 */
	void scale(double factor);
}
